Not using UEFI does not work that well, then you're back to MBR and the continual fight between Windows and GRUB.
I run a dual boot Win10/Fedora30 system (UEFI on a SATA3 SSD), it's pretty good, both Windows and Fedora.
I run a dual boot Win10/Fedora30 system (UEFI on a SATA3 SSD), it's pretty good, both Windows and Fedora.